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Finding the Fourth Proportional to 663,121.69, 994,876.61 and 213,833.52

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Solution

The fourth proportional to 663,121.69, 994,876.61 and 213,833.52 is: 320,812.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,121.69 : 994,876.61 = 213,833.52 : x
  2. Step 2: Convert to fraction form
    663,121.69/994,876.61 = 213,833.52/x
  3. Step 3: Cross multiply
    663,121.69x = 994,876.61 × 213,833.52
  4. Step 4: Simplify right side
    663,121.69x = 212,737,966,412.80
  5. Step 5: Solve for x
    x = 212,737,966,412.80/663,121.69
  6. Step 6: Final answer
    x = 320,812.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.